[ 1956.840981][ T9855] br0: port 1(dummy0) entered blocking state
[ 1956.841210][ T9855] br0: port 1(dummy0) entered disabled state
[ 1956.841960][ T9855] dummy0: entered allmulticast mode
[ 1956.843006][ T9855] dummy0: entered promiscuous mode
[ 1956.870879][ T9856] br0: port 1(dummy0) entered blocking state
[ 1956.871117][ T9856] br0: port 1(dummy0) entered forwarding state
[ 1958.818162][  T951] dummy0: left allmulticast mode
[ 1958.819267][  T951] dummy0: left promiscuous mode
[ 1958.819767][  T951] br0: port 1(dummy0) entered disabled state